Adjusting mechanism for lens-casings.



E. KANDLER.

ADJUSTING MBGHANISM l-OR LENS GASINGS.

APPLICATION FILED NOV. 17, 1913A y s. ateuted Feb. 9, 1.915.

2 SHEETS-SHEET l,

E. KANDLER., ADJUSTING MBGHANSM FOB. LENS UASINGS.

APYLIGATION FILED mm1?, 191s.

Lgy. Patented Feb,9,1915.

2 SHEETS-SHEET 2.

EDMUND KANDLEE, OF ROCHESTER, NEW YORK, ASSIGN'OB T0 BASCH & LOMBOPTICAL COMPANY, OFROCHESTER, NEW YORK, .A CORORATION OF NEW YORK.'

Amusrme Meenemen' For.. Lansossinos.,

. manana,

State of New York, have invented certain new and useful Improvements inAdjusting Mechanism for-Lens-Casings; and l do here- 'by declare thatthe following,r is a full, clear,

and exact description of the saine, reference being.,y had to theaccompanying drawings,

forming a part of this specification, and tov the reference-numeralsmarked thereon.

' My invention relates to projection apparatus and similar mechanism,that include vis casings or mountsfor lenses that require longitudinalad]usgment for focusing, and it has for its'priinary object to provide astructure' that mayle readily lattached to the traine of a machine, andafl'oi'ds'a convenient arrangement ofjparts' for permitting the nlenssystem` to be quickly adjusted.

A further upurpose of the invention resides y in providing' means forguiding the move 'ment of the lens casing during" its adjustment; so astofinaintain it' constantly in its proper relation to die ii'ame orstationary parts ot, the apparatus,

To these. and other ends the invention consists in certain 'improvementsand combinations of parts, all as will be hereinafter more fullydesqribed, the novel features being pointed out in the claims at the endof the specification.

ln the drawings: Figure Vl is a plan view.

of one embodiment of my invention; Fig. 2 is a vertical sectional viewon the line 2- a of Fig. l; Fig@ is a side elevation with parts insection, and Fig. 4 is a transverse *sectional view;

Similar l reference numerals throughout the several figures indicate thesame parts.

In the construction shown, l designates a- ,standai'd or supportarranged in any suit- '.able manner upon the frame, said support beingprovided withtheppening 2, to ret t fuient of the invention, it will beobvious thatceive the cylindrical lens casing 3 in which the usualadjustable lens system is mounted,

' Detachably mounted on-the support l is an interiorly threaded ring 4,flanged at 5 and 'a threaded portion 7 which engages said held `in,engagement with the support oy ,means of the screws 6,-and adjustablyarranged within the ring 4 is a. holder having ring, and provided withan extensin d for ,a purpose that will presently appear. The

circnlar portion? and the lextensie/x1 y8 serve ,Specication of-IietteisPatent.. Applicatiiinled November 17, ,1813. SerialNo. 801,351.1

' resented rea, a, reis;

to support the lens casing in the desired position of adjustment, suchadjustment being obtained preferably b v the mechanism that vl willnovff'describe. To thisiend, the lens casing 3 has secured thereto arack9 which is a'rrangedw'to be engaged .by` apinion' 10, j the latter'being yiurnaled upon the extent5 afford an operative device, I havefound that in order 'to insure holding the lenses accurately in theirtrue positions, it is necessary to provide .supplemental guidinginstrumentalitics, consisting of a positive guiding connection betweenthe lens casing' and the'liolder. This'l preferablyaccomplish by meansof guideways-.carriedpn the casing and .guiding poitions on the holderwhich coperate with the said guidew'ays so as to always eilect amovement of the lens casing vin the direction of its longitudinal axis.guiding device just referred to comprises guideways which are preferablyof il-shaped formation and formed hy tracks 12 attached to the casing`3. Cooperating with the guide- Ways are guiding members or flanges 13,formed on the extension 8 of the holder and having their edgesconstructed to correspond to the shape of' the guideways, vvherebya Hueand accurate contact is aiforded between the relatively movable parts.By this construction, it is possible to obtain the neces saryadjustments of the `lens'casinpg, and at the same time to hold thelatter rigidly in any position, the guiding holder seri/innr to alwaysvIiiai'ntain the lens casina,r in its proper relation to the traine ofthe machine and in correct alinenient. Y.

While I have disclosed a specific embodi- In the present arrangement,the I,

ica

'los

'which carries the guideways and arranged intermediate the latter,guides on the other of sind parts 1n engagement with the guide- Way andextending vloetween the guideways a d the rack, and operating means onthe part which carresthe guides, said operating means copereting withthe raek'-to adjust the casing.

2. The combination with a cylindrical casing, of a holder for thecasing, vguideways or tracks arranged on the casmg and extendinglongitudinally of the same, a. rack attuchedto the casing intermediatesaid guideways, guides on the holder having engagement with theguideways on the casing, sind guides being curved laterally andembracing the cylindrical surfaceof the easing between

